Soluble casein.



- 0. A; 'BAEGHLER.

SOLUBLE GASBIN. mrmognon FILED SEPT. 7, 1909.

WITNESSES wlaw w 0G,.MYM,

Patented July 25, 1911.

CARL- ALBRECHT BAECHLER, OF ZURICH, SWITZERLAND.

SOLUBLE CASE-IN.

Original application filed November 10, 1808, Serial N Specification ofLetters Patent. Patented July 25, 1911. 0. 461,925. Divided and thisapplication filed Septemher 7, 1909. Serial No. 516,330.

To all whom it may concern:

Be it known that I, CARL ALBRECHT BAEOHLER, a citizen of Switzerland,residing at 5 Kollikerstrasse, Zurich, Switzerland, dairy-engineer, haveinvented certain new and useful Improvements in Soluble Casein,

of which the following is a specification.

Hitherto finely subdivided casein, has only i been obtainable from acasein made 'either by grinding the curd separated directly from themilk, or by re-dissolving the curd and precipitating the subdividedcasein from the solution or drying the solution.

This invention whichwas originally included in my application. filed10th November 1908 Serial No. 461,925, relates to the manufacture ofalkaline casein from a casein obtained directly from milk in a finelysubdivided or more or less pulverulent condition, so that it does nothave to be ground.

The accompanying drawing will make clear the distinction between theproduct of this invention and the forms of finely divided caseinhitherto known.

Each figure is a copy of a micro hotograph, the magnification being 200iameters.

Figure 1 represents ordinary ground casein, Fig. 2 casein which has beenredissolved and precipitated or obtained by drying the solution, andFig. 3 the roduct made according to the present invention, having grainsfinely subdivided by agitation when the coagulum is formed and whichhave rounded and not angular profiles.

In the application above referred to, a

process for making dry finely subdivided casein of a neutral nature isdescribed, and the following example is given by way of illustration :Tothe. skim milk, warmed to 3032 (1., calcium chlorid dissolved in alittle water is added to the extent of 0.5 part of the salt per 1000parts of the skim milk. A solution of rennet ferment 'is then added insuch proportion that coagulation begins within 5 minutes. At the momentwhen the first indication of coagulation is perceived, rapid stirring bymeans of a stir.- ring device is started and when the casein has becomefinely subdivided, .1 part per 1000 of ammonia alum, dissolved in alittle water,

is added; the whole' is .now heated, while stirring, until during 5-10minutes the temperature has risen gradually to 52 0., whereupon, whilestill stirring, the whole is cooled again in any known suitable manner,the temperature bein brought to 15 C. The alum may be adc led-before therennet ferment or together therewith, instead of at thestage stated.

The casein is separated from the whey either by filtration orcentrifugal action and washed; in the first case itis pressed and ineither case the cake obtained is broken up and dried in a current ofair, with aid of warming if necessary; in a few hours. The casein thusobtained is neutral. To render it alkaline, the casein which has beenpressed or subjected to centrifugal action, is moistened before ithascompletely dried, with a small percentage of. an alkali, such as -sodiumbicarbonate and is then further treated as prescribed-forthe neutralcasein. The proportion of alkali added depends on the urpose for whichthe casein is destined; or instance, some 35 per cent. of sodiumbicarbonate, calculated in the dry casein may be added if it is merelyrequired that the alkali casein shall be soluble in water.

Having thus described my invention and the best means I know ofcarryingthe same into practical effect, I claim 1 A process for the manufactureof a finely subdivided alkaline casein, whichprocess consists in firstadding to the milk an agent to form a coagulum of casein and an agent toact upon and cause the casein to shrink, then, at the moment when thecoagulation is first perceived, rapidly agitating the whole until thecasein is in a finely subdivided condition, then, while continuing toagitate, successively temperature not exceeding 100 C. and cooling it toa temperature not below 0 C., then separating the casein, thenmoistening the casein with a solution of an alkali, and finally dryingthe casein.

2. As a new article of manufacture, finely subdivided but ungroundalkaline casein soluble in water, and having the form of the drying iscomplete a solution containing heating the whole to a grains withrounded profiles, which grains name to this specification in t do notegglomerate. two subscribing witnesses.

3. As a new article of manufacture, alkahe presence of line caseinconsisting of minute grains hav- CARL ALBRECHT BAECHLER'} 5 ing roundedprofiles, which do not agglom- Witnesses:

' crate, and belng soluble in water. A. BOLLER,

In testimony whereof I have signed my A. STORRER.

